"DC Fan" When the rotor S pole leave 9141,9141 PIN3, PIN2 of DRIVER has ΔT time together ended, PIN3, PIN2 output high potential, avoid red coils L1, L2 yellow work simultaneously. Dependent on the inertia of the rotor, the rotor N-pole Move 9141, Hall Hall voltage components produce, after a series of signal processing, the final 9141 PIN2 output low potential, (9141 PIN3 output high potential), through yellow coil L2 current I2 4 stator poles, respectively, to produce the opposite pole: P1 → N; P2 → S; P3 → N; P4 → S; and a rotor (magnetic stripe) 4-pole, the occurrence of magnetic force, pushing counterclockwise rotation of the rotor. Since 9141 the induced magnetic field strength and polarity change, constantly switching 9141 PIN2, PIN3 the DRIVER alternately turns conducting, brushless DC motor and ultimately electronic exchange control, the motor rotor spinning.